US3381621A - Self-priming pump - Google Patents

Self-priming pump Download PDF

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Publication number
US3381621A
US3381621A US575208A US57520866A US3381621A US 3381621 A US3381621 A US 3381621A US 575208 A US575208 A US 575208A US 57520866 A US57520866 A US 57520866A US 3381621 A US3381621 A US 3381621A
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US
United States
Prior art keywords
stage
liquid
full
admission
chamber
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US575208A
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English (en)
Inventor
Luhmann Reinhold
Hagemann Walter
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemen and Hinsch GmbH
Original Assignee
Siemen and Hinsch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemen and Hinsch GmbH filed Critical Siemen and Hinsch GmbH
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Publication of US3381621A publication Critical patent/US3381621A/en
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Expired - Lifetime legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D9/00—Priming; Preventing vapour lock
    • F04D9/04—Priming; Preventing vapour lock using priming pumps; using booster pumps to prevent vapour-lock
    • F04D9/041—Priming; Preventing vapour lock using priming pumps; using booster pumps to prevent vapour-lock the priming pump having evacuating action

Definitions

  • This invention relates to a self-priming centrifugal pump with at least one full-admission, normal priming stage and one self-priming venting stage lying outside the impelling flow.
  • the self-priming stage on the suction side of the pump and the gas or air being drawn off from the suction chamber of the particular rst fulladmission impeller.
  • the gas or air sucked from the self-priming stage can be impelled hack into the suction vessel or can flow to atmosphere or into the pressure chamber of the pump or into any suitable chamber in the pump.
  • a separate pipe must be provided to lead from the venting stage tO the suction vessel and during the flow of liquid this stage sucks liquid from the suction vessel and impels it back therethrough.
  • the outlet aperture should be provided with a valve, which during the flow of liquid prevents the escape of liquid impelled from the self-priming stage into the atmosphere.
  • the self-priming stage would be filled with liquid after venting of the suction pipe and always travels against the closed pressure side.
  • drawn-ofi air or the gas sucked out of the suction pipe to be impelled into the pressure pipe of the pump, or at another suitable point of the pump it can happen that with normal liquid flow the pressure head of the fulladmission stage or stages is so large, that the selfpriming stage can no longer overcome this pressure drop and flows through opposite to its normal direction of flow, therefore an active current is formed which unnecessarily loads the self-priming stage even further.
  • a further disadvantage of these constructions is that the venting of the suction pipe, especially with pumps having the venting stage on the suction side and with onestage pumps, takes a very long time and the flow of the liquid impelled by the pump at first begins only intermittently.
  • the liquid sucked in does not fill the whole Fice pump suction chamber suddenly, it instead enters the pump casing turbulently on account of the movement of the column of liquid in the suction pipe, it first arrives in the self-priming stage and interrupts the flow of gas or air until the flood of liquid has passed through the stage.
  • the selfpriming stage is formed as a side channel or liquid annulus stage, as this stage is then easily in a position to impel the liquid present after the venting of the suction pipe.
  • this self-priming liquid annulus or side channel stage double-acting.
  • FIGURE 1 shows a longitudinal cross-section through a base support pump made according to the invention, and illustrates an embodiment in which the full-admission stage includes a volute casing and the venting stage is in the form of a liquid annulus pump.
  • FIGURE 2 shows a section taken along the line 2-2 in FIGURE l through the helical volute casing part of the pump.
  • FIGURE 3 shows a section taken along line 3 3 in FIG. l and illustrates the venting stage of the pump.
  • FIGURE 4 shows a longitudinal section through a modified base support pump according to the invention, in which the fulladmission stage includes a guide wheel or diffusion vane casing and the venting stage is in the form of a side channel pump.
  • a full-admission impeller 1 and a partial-admission impeller 2 of the self-priming liquid annulus stage are supported on a shaft 3.
  • a suction pipe is attached to a suction connecting member 4 and a pressure pipe is connected to a pressure connection member 5 which has a main outlet opening 5 therein.
  • the impeller 2 of the self-priming stage rotates between control discs 6 and 7.
  • Volute or helical casing 17 has an axis disposed in a horizontal plane so that the casing includes an upper portion and a lower portion with respect to this plane.
  • the self-priming stage can suck the gas before the start of the liquid flow out of the suction pipe and suction member 4 and a volute impelling chamber 17 of the full-admission stage through one or more auxiliary outlet openings or bores 8, 9 or 10.
  • the bore 9 is situated in the rst half of the helical casing 17 (viewed from the spine 11 in the direction of rotation) the volute chamber 17 increasing in cross-section (in the direction of rotation of the impeller) from its initial smallest area at the spine 11 towards the main outlet opening 5.
  • the bores 8 and 10 are situated in slot chambers 18, 19 lateral to the full-admission impeller 1 and like the bore 9 are in this embodiment permanently connected to a suction chamber 12 of the self-priming stage.
  • the slot chambers 18, 19 are portions of extensions of the impelling chamber 17 and are of substantially U-shaped cross-section.
  • the bore 8 opens out into a further bore 13, which is formed in the helical pump ⁇ casing and which does not necessitate any special alterations to the pump.
  • the bores 9 and 10 are connected by corresponding pipe guides with the suction chamber 12 of the self-priming stage. If desired, the pipe guide relating to the bore can be arranged outside the pump.
  • the auxiliary outlet opening or bore 9 is positioned in an area of the volute or helical casing 17, in which at any rate the wall thickness is necessarily increased by a rib-like portion 17" since the casing is a cast part.
  • no special change in the shape of the volute casing is required to accommodate the auxiliary outlet opening 9.
  • the spine-shaped portion 1l of the casing is extended downward so that the transfer of liquid from the volute chamber 17 to a discharge passage or pressure chamber 20 takes place in the lower part of casing 17.
  • the venting stage comprising the impeller 2 is in the form of a double-acting liquid annulus pump.
  • a pair of slots 14 are arranged in the control disc 7 at the delivery side of the pump and serve as the outlet openings for a pair of impelling chambers 1S of the venting stage.
  • a bore 16 is provided for the discharge of air, gas or other fluid delivered by the impeller of the venting stage and to be removed from the pressure chamber thereof.
  • impeller 21 of the full-admission stage and irnpeller 22 of the venting stage are mounted on shaft 23.
  • the venting stage is in the form of a side channel pump and the full-admission stage in the form of a guide wheel or diffusion casing pump.
  • the latter stage has a suction connection member 24 and a pressure connection member 25.
  • the impelling chamber of the venting stage is enclosed by control discs 2.6 and 27.
  • the control disc 27 accommodates side channel 28.
  • Guide wheel or diffusion vane member 29 of the full-admission stage is secured to circular casing 30.
  • the venting stage is here again arranged to draw air or gas out of the suction connection and the impelling chamber of the full-admission stage through one or more auxiliary outlet openings or bores 31, 32 before the delivery of liquid starts.
  • the auxiliary outlet openings 31, 32 are positioned in slot chambers 40, 41 laterally of the impeller 21 of the fulladmission stage.
  • Bore 32 is located in casing 3G and leads directly to suction chamber 33 of the venting stage.
  • Bore 31 may be connected to the suction chamber 33 of the venting stage through an external duct 34 indicated in dotted lines in FIG. 4.
  • Air or gas will be caused to pass from suction chamber 33 of the venting stage through a slot 35 in control disc 26 to the impelling chamber formed by the spaces between the vanes of impeller 22 in conjunction with the side channel 23 and will then pass from the impelling chamber to pressure chamber 36 of the venting stage. Finally, the air or gas drawn from the suction member and impelling chamber of the full-admission stage will be delivered through an opening 37, a pipe 38 anda bore 39 to the pressure connection member 25 of the full-admission stage, that is, the stage out of the slot chamber or chambers of which the air or gas was drawn.
  • the hydraulic sealing of the suction side of the pump with respect to the pressure side can be effected by a liquid seal, which forms in the region in which the impelling chamber merges with the discharge passage or pressure connection member.
  • a liquid seal which forms in the region in which the impelling chamber merges with the discharge passage or pressure connection member.
  • the spine 11 (FIG. 2) is drawn downwards to an extent such that sufiicient space is left for the formation of a liquid seal below the outlet opening 5.
  • a non-return valve on the pump pressure connection member. The sucked-in air or gas must then however be impelled behind the nonreturn valve into the pressure pipe.
  • single-stage pumps have been selected as examples of the invention.
  • the invention can however easily be applied even for multistage pumps, in which connection the self-priming stage can be arranged as desired either on the pressure side or on the suction side of the pump.
  • a self-priming centrifugal pump unit at least one full-admission normal-priming stage having a main outlet opening, an impeller in said full-admission stage for rotation in a predetermined direction to produce a main flow of liquid to be pumped, a volute-type chamber arranged in said full-'admission stage for receiving liquid from said impeller during rotation thereof and connected to said main outlet opening for discharge of liquid, said volutetype chamber increasing in cross-section from its initial smallest area towards its connection with said main outlet opening and having an auxiliary outlet opening therein, a self-priming venting stage disposed outside said main flow of liquid, a suction chamber in said venting stage, and duct means permanently connecting said suction chamber of the venting stage to said auxiliary outlet opening of the full-admission stage for removing air and other gases from said full-admission stage to prime the latter, said auxiliary outlet opening being located in said volute-type chamber in the region extending from said initial smallest area of the volute-type chamber approximately halfway around said
  • At least one full-admission normal-priming stage including a volute casing having a spine-shaped internal part terminating in a Ifluid cut-off end and a main outlet opening, said fulladmission stage further including an auxiliary outlet opening and an impeller mounted in said casing for rotation in a predetermined direction to produce a main flow of liquid to -be discharged through said main outlet opening; a selfpriming Venting stage disposed outside said main ow of liquid, a suction cham-ber in said venting stage; and connecting means extending from said suction chamber of the venting stage to said auxiliary outlet opening of the full-admissi-on stage for removing air from said full-admission stage to prime the latter said auxiliar-y outlet opening being located in the surface of said spine adjacent the periphery of the impeller in the region extending approximately half way around said impeller in said predetermined direction of rotation from the end of said spine-shaped part.
  • volute casing has an axis disposed in a substantially horizontal .plane and includes an upper portion and a lower portion with respect to said plane, said upper portion having said auxiliary outlet opening therein and said lower portion being connected to said main outlet opening.
  • At least one full-admission normal-priming stage including a volute casing having a spine-shaped internal part and a main outlet opening, said full-admission stage further including an impeller mounted in said casing for rotation in a predetermined direction to produce a main flow of liquid to be discharged through said main outlet opening, one portion of said casing extending lfrom said spineshaped part halfway around said impeller in said predetermined direction of rotation and having an auxiliary outlet opening therein, said casing having ribs for reinforcing said casing and forming partitions therein; a selfpriming venting stage disposed outside said main ow of liquid, a suction chamber in said venting stage; and duct means extending from said suction chamber of the venting stage to said auxiliary outlet opening .of the full-admission stage for removing air from said full-admission stage to prime the latter, said duct means vbeing disposed at least partially in said ribs ofthe casing.
  • a pump casing having ribs for reinforcing said casing and forming partitions therein, at least one full-admission normalpriming stage positioned in said casing and having a main outlet opening, a rotary impeller in said full-admission stage for producing a main ow of liquid to be pumped, an impelling chamber arranged in said full-admission stage for receiving liquid from said impeller during rotation thereof and connected to said main outlet opening for discharge Iolf liquid, said impelling chamber having at least one slot-shaped portion postioned substantially laterally of said impeller, said slot-shaped portion being provided with at least one auxiliary outlet opening for permitting flow of fluid from said impelling chamber through said slot-shaped portion to said auxiliary outlet opening, a selfpriming venting stage disposed in said casing outside said main flow of liquid, a suction chamber in said venting stage, and duct means extending from said suction charnber of the venting stage to said auxiliary outlet opening

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
US575208A 1965-08-03 1966-08-02 Self-priming pump Expired - Lifetime US3381621A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES0098619 1965-08-03

Publications (1)

Publication Number Publication Date
US3381621A true US3381621A (en) 1968-05-07

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Family Applications (1)

Application Number Title Priority Date Filing Date
US575208A Expired - Lifetime US3381621A (en) 1965-08-03 1966-08-02 Self-priming pump

Country Status (7)

Country Link
US (1) US3381621A (ja)
AT (1) AT274589B (ja)
BE (1) BE685041A (ja)
CH (1) CH453081A (ja)
ES (1) ES329828A1 (ja)
GB (1) GB1152728A (ja)
NL (1) NL6610840A (ja)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4371310A (en) * 1974-07-23 1983-02-01 The United States Of America As Represented By The Secretary Of The Navy Centrifugal pump recirculation diffuser
US4819884A (en) * 1985-01-31 1989-04-11 Microfuel Corporation Means of pneumatic comminution
US4819885A (en) * 1985-01-31 1989-04-11 Microfuel Corporation Means of pneumatic comminution
US4824031A (en) * 1985-01-31 1989-04-25 Microfuel Corporation Means of pneumatic comminution
US4923124A (en) * 1985-01-31 1990-05-08 Microfuel Corporation Method of pneumatic comminution
EP1191228A2 (en) * 2000-09-20 2002-03-27 APV Fluid Handling Horsens A/S Self priming centrifugal pump
US20100226794A1 (en) * 2006-04-06 2010-09-09 Alfa Laval Kolding A/S Self-Ventilating Centrifugal Pump
CN105952612A (zh) * 2016-05-09 2016-09-21 高洪亮 一种泵用自吸装置及方法
US20180058466A1 (en) * 2015-03-13 2018-03-01 Gea Tuchenhagen Gmbh Self-Priming Pump
CN113513479A (zh) * 2021-04-23 2021-10-19 江苏大学 一种气液分离的多级泵装置及使用方法
US20220105858A1 (en) * 2020-10-02 2022-04-07 Frideco Ag Pump System and Method for Operating a Pump System

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101072855B1 (ko) * 2011-06-09 2011-10-14 김찬원 진공 강 자흡식 펌프
DE102020103022B4 (de) 2020-02-06 2022-09-29 KSB SE & Co. KGaA Pumpenanordnung

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE440679C (de) * 1924-07-19 1927-02-11 Armaturen & Maschinenfabrik A Ballastpumpe
GB361215A (en) * 1931-02-23 1931-11-19 Pulsometer Eng Co Improvements in or relating to means for priming centrifugal pumps
FR781629A (fr) * 1933-12-09 1935-05-18 Pompe centrifuge à un ou plusieurs étages, comportant une pompe aspirant l'air pour l'élimination de l'air de la conduite d'aspiration
GB465262A (en) * 1936-02-19 1937-05-04 Otto Siemen Improvements in and relating to liquid pumps with a rotary cell wheel
DE657041C (de) * 1933-10-05 1938-02-22 Armaturen & Maschinenfabrik Ak Pumpe zur Erzeugung von Luftschaum fuer Feuerloeschzwecke
US2153360A (en) * 1936-05-26 1939-04-04 Gen Electric Motor driven fluid pump
US2553066A (en) * 1944-06-30 1951-05-15 Southern John Self-priming centrifugal pump
US2660956A (en) * 1949-06-03 1953-12-01 Waterous Co Priming arrangement for centrifugal pumps
US3082694A (en) * 1960-05-24 1963-03-26 Ingersoll Rand Co Self-priming centrifugal pump

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE440679C (de) * 1924-07-19 1927-02-11 Armaturen & Maschinenfabrik A Ballastpumpe
GB361215A (en) * 1931-02-23 1931-11-19 Pulsometer Eng Co Improvements in or relating to means for priming centrifugal pumps
DE657041C (de) * 1933-10-05 1938-02-22 Armaturen & Maschinenfabrik Ak Pumpe zur Erzeugung von Luftschaum fuer Feuerloeschzwecke
FR781629A (fr) * 1933-12-09 1935-05-18 Pompe centrifuge à un ou plusieurs étages, comportant une pompe aspirant l'air pour l'élimination de l'air de la conduite d'aspiration
GB465262A (en) * 1936-02-19 1937-05-04 Otto Siemen Improvements in and relating to liquid pumps with a rotary cell wheel
US2153360A (en) * 1936-05-26 1939-04-04 Gen Electric Motor driven fluid pump
US2553066A (en) * 1944-06-30 1951-05-15 Southern John Self-priming centrifugal pump
US2660956A (en) * 1949-06-03 1953-12-01 Waterous Co Priming arrangement for centrifugal pumps
US3082694A (en) * 1960-05-24 1963-03-26 Ingersoll Rand Co Self-priming centrifugal pump

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4371310A (en) * 1974-07-23 1983-02-01 The United States Of America As Represented By The Secretary Of The Navy Centrifugal pump recirculation diffuser
US4819884A (en) * 1985-01-31 1989-04-11 Microfuel Corporation Means of pneumatic comminution
US4819885A (en) * 1985-01-31 1989-04-11 Microfuel Corporation Means of pneumatic comminution
US4824031A (en) * 1985-01-31 1989-04-25 Microfuel Corporation Means of pneumatic comminution
US4923124A (en) * 1985-01-31 1990-05-08 Microfuel Corporation Method of pneumatic comminution
US6585493B2 (en) * 2000-09-20 2003-07-01 Apv Fluid Handling Horsens A/S Hygienic self-priming centrifugal pump
EP1191228A2 (en) * 2000-09-20 2002-03-27 APV Fluid Handling Horsens A/S Self priming centrifugal pump
EP1191228A3 (en) * 2000-09-20 2004-04-28 APV Fluid Handling Horsens A/S Self priming centrifugal pump
US20100226794A1 (en) * 2006-04-06 2010-09-09 Alfa Laval Kolding A/S Self-Ventilating Centrifugal Pump
US8172549B2 (en) * 2006-04-06 2012-05-08 Alfa Laval Kolding A/S Self-ventilating centrifugal pump
US20180058466A1 (en) * 2015-03-13 2018-03-01 Gea Tuchenhagen Gmbh Self-Priming Pump
US10544795B2 (en) * 2015-03-13 2020-01-28 Gea Tuchenhagen Gmbh Self-priming pump
CN105952612A (zh) * 2016-05-09 2016-09-21 高洪亮 一种泵用自吸装置及方法
US20220105858A1 (en) * 2020-10-02 2022-04-07 Frideco Ag Pump System and Method for Operating a Pump System
CN113513479A (zh) * 2021-04-23 2021-10-19 江苏大学 一种气液分离的多级泵装置及使用方法

Also Published As

Publication number Publication date
BE685041A (ja) 1967-01-16
NL6610840A (ja) 1967-02-06
CH453081A (de) 1968-05-31
GB1152728A (en) 1969-05-21
ES329828A1 (es) 1967-06-01
AT274589B (de) 1969-09-25

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